High Torque Quartz Clock Movement (Silent Sweep) Extended Shaft For Long Hands - Short Shaft motor size: 2-1/8" sq. x 5/8 thick x 5/16" dia. shaft 1/4" (5mm) threaded shaft, total 5/8" including hand stem requires one "AA" battery (not incl) high torque motor silent sweep extended shaft 3 year factory warranty